User blog comment:PokeFreak117/HEEEELP!!/@comment-30040946-20180419010147/@comment-27843946-20180419041629

There's a rather big difference between "copyright infringement" and "fair use".

PBB was fair use.

It was transformative in a way that took the source material and made it into something entirely different that bore only superficial resemblance to said source material.